//
// Created by zing on 4/30/2020.
//


#include <iostream>
#include <string>
#include <cctype>
#include <vector>

using std::cin;
using std::cout;
using std::endl;
using std::vector;
using std::string;

int main() {
    vector<int> v1;         // size:0,  no values.
    vector<int> v2(10);     // size:10, value:0
    vector<int> v3(10, 42); // size:10, value:42
    vector<int> v4{10};     // size:1,  value:10
    vector<int> v5{10, 42}; // size:2,  value:10, 42
    vector<string> v6{10};  // size:10, value:""
    vector<string> v7{10, "hi"};  // size:10, value:"hi"

    cout << "v1 size :" << v1.size() << endl;
    cout << "v2 size :" << v2.size() << endl;
    cout << "v3 size :" << v3.size() << endl;
    cout << "v4 size :" << v4.size() << endl;
    cout << "v5 size :" << v5.size() << endl;
    cout << "v6 size :" << v6.size() << endl;
    cout << "v7 size :" << v7.size() << endl;

    cout << "v1 content: ";
    for (auto i : v1) {
        cout << i << " , ";
    }
    cout << endl;

    cout << "v2 content: ";
    for (auto i : v2) {
        cout << i << " , ";
    }
    cout << endl;

    cout << "v3 content: ";
    for (auto i : v3) {
        cout << i << " , ";
    }
    cout << endl;

    cout << "v4 content: ";
    for (auto i : v4) {
        cout << i << " , ";
    }
    cout << endl;

    cout << "v5 content: ";
    for (auto i : v5) {
        cout << i << " , ";
    }
    cout << endl;

    cout << "v6 content: ";
    for (auto i : v6) {
        cout << i << " , ";
    }
    cout << endl;

    cout << "v7 content: ";
    for (auto i : v7) {
        cout << i << " , ";
    }
    cout << endl;
    return 0;
}